* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
a {
  text-decoration: none;
  color: red;
}
.app {
  background-color: #fff;
  section {
      position: relative;
      left: 330px;
      width: 1200px;
      background-color: #e7e3e2;
      padding: 10px;
      .header {
          padding: 15px 10px;
          width: 100%;
          height: 50px;
          background-color: #f1f1f1;
          border: 1px solid #999;
          border-bottom: 0;
      }
      .body {
          position: relative;
          width: 100%;
          height: 150px;
          overflow: hidden;
          border: 1px solid #999;
          border-top: 1px dashed #999;
          margin-bottom: 15px;
          img {
              position: absolute;
              top: 10px;
              left: 10px;
              height: 130px;
              width: 130px;
          }
          .img_msg {
              position: absolute;
              top: 60px;
              left: 170px;
          }
          h3 {
              position: absolute;
              top: 60px;
              left: 500px;
          }
      }
  }
}